【作者】 谢孔昶；

【导师】 李蕾；

【作者基本信息】 沈阳航空航天大学 ， 机械设计及理论， 2011， 硕士

【摘要】 随着煤炭开采业的日益发展,对煤炭开采时进行瓦斯抽采和地质钻探的坑道钻机提出了更高的要求,即用高效、快捷、有效的方法对钻机进行合理的改进,以提高其效率,增加可靠性。坑道钻机是煤矿井下钻进的核心设备。钻机工作环境复杂多变,工作时钻进岩层对钻机的反馈作用力随岩层硬度而发生变化。过去,钻机的传动系统采用定量泵——定量马达和变速器组成的液压变速形式,钻机在工作时的输出速度依变速器的两个恒定档位,由于外部的反作用力的变化常常引起对钻机钻头的刚性冲击,尤其是遭遇硬岩时常常会产生剧烈震颤,严重时甚至发生打钻现象,使钻机的工作寿命降低。同时,由于液压油温加剧上升,需停机为其提供冷却时间,因而又影响了钻探的生产效率。为解决以上问题,目前的钻机设计改用变量传动方式。即采用变量泵——变量马达和减速器组成的容积式液压变速形式,通过改变流量来改变内部输出,因此能够在一定范围内对不同硬度的岩层进行自适应式调节;同时由于液压变速自身又具有减震的性能,使钻进过程产生的刚性冲击转变为柔性冲击,从而提高了钻机的可靠性。本文以系统设计思想为基础,以模块化设计为目标,首先对钻机整机,尤其是传动系统进行了详细的分析,通过对定型产品的传动系统进行理论分析,建立了容积式液压变速系统的理论计算模型,提出柔性设计的理论依据;其次利用其相关参数建立了其核心部件——减速器的模糊优化设计数学模型,并应用MATLAB进行了优化计算,为传动系统结构优化提供了理论支持。最后,将模块化设计思想引入钻机设计中,对坑道钻机整机进行模块化总体设计,基于VB建立了钻机产品模块化设计框架系统,完成一级模块和二级模块的划分,为钻机的系列产品设计提供基础和技术支持。更多还原

【Abstract】 With the increasing development of coal mining industry, higher requirements are raised by tunnel drilling machine for gas extraction and geological drilling during coal mining, meaning that reasonable improvements are made to the machine by using efficient, fast and effective way to improve its efficiency and increase reliability.Tunnel drilling machine is the core equipment for underground drilling. Since the working environment of drilling machine is complicated and changeable, rock hardness changes the reaction exerted by the rock layer on the machine while it works. In the past, the transmission system of the drilling machine include constant displacement pump - constant displacement motor and transmission. There are two constant gears according to the output speed of the working drilling machine. Because the changes of the exterior reacting force of usually cause the rigid impact of drill, especially when encountering hard rock, violent tremors are often caused, damaged bit even occurs in severe cases, which reduce the working life of drill. Meanwhile, due to the temperature of the hydraulic oil rise sharply, it is necessary for the machine to close down and provide time for the oil to cool down, which therefore affects the drilling production efficiency.To solve the above problem, the present design of the drilling machine adopt the variable driving mode. Meaning that the transmission system of the drilling machine include variable displacement pump - variable displacement motor and transmission, by changing the flow to change the internal output, so that adaptively type adjustment to different hardness layers can be made within a certain range. Simultaneously because changing the speed oneself by hydraulic pressure can also have the performance of shock absorption, which transforms rigid impact into flexible shocks, thereby improving the reliability of the drilling machine.Based on the system design thought, this article takes the modular design as the goal. Firstly, carry on a detailed analysis to the drilling machine especially the transmission system. Through theoretical analysis of the finalized product transmission system, the theoretical calculation model of the positive displacement hydraulic transmission system is established, and provide theory basis for the flexible design. Secondly, by using its relevant parameters, establish its core components -fuzzy optimization mathematical model of reducer, and apply MATLAB to optimize, which provides a theoretical support for transmission system structure optimization. Finally, introducing the modular design thought to the drilling machine design, modular overall design for the tunnel drilling machine is made. Driller product modular design framework system is established based on VB, level modules and secondary module are divided, which provide the basis and technical support for series products design of the drilling machine.更多还原